Structure and Transport Properties of the BiCuSeO-BiCuSO Solid Solution.

ABSTRACT: In this paper, we report on the crystal structure and the electrical and thermal transport properties of the BiCuSe_1-xS_xO series. From the evolution of the structural parameters with the substitution rate, we can confidently conclude that a complete solid solution exists between the BiCuSeO and BiCuSO end members, without any miscibility gap. However, the decrease of the stability of the materials when increasing the sulfur fraction, with a simultaneous volatilization, makes it difficult to obtain S-rich samples in a single phase. The band gap of the materials linearly increases between 0.8 eV for BiCuSeO and 1.1 eV in BiCuSO, and the covalent character of the Cu-Ch (Ch = chalcogen element, namely S or Se here) bond slightly decreases when increasing the sulfur

SUBMITTER: Berardan D 

PROVIDER: S-EPMC5455453 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature